
#共用的定义工具类
from flask import session, current_app, g

from info.models import User

import functools


def do_index_class(index):
    # 返回指定索引对应的类名
    if index == 0:
        return "first"
    elif index == 1:
        return "second"
    elif index == 2:
        return "third"
    return ""

def user_login_data(f):
    # 使用functools.wraps 去装饰内层函数,可以保持当前装饰器去装饰的函数 __name__的值不变
    @functools.wraps(f)
    def wrapper(*args,**kwargs):
        # 查询用户登录信息
        user_id = session.get("user_id", None)
        user = None
        if user_id:
            #     尝试查询用户的模型
            try:
                user = User.query.get(user_id)
            except Exception as e:
                current_app.logger.error(e)
        #         把查询出来的数据赋值给g变量
        g.user = user

        return f(*args,**kwargs)

    return wrapper


# def query_user_data():
#     # 查询用户登录信息
#     user_id = session.get("user_id",None)
#     user = None
#     if user_id:
#     #     尝试查询用户的模型
#         try:
#             user = User.query.get(user_id)
#         except Exception as e:
#             current_app.logger.error(e)
